lg u400 unlocking procedure?

can any one help me how to unlock my lg u400?
plz…….
Answer #1
From www.imeicodes.co.uk
Model : LG U400
1. Insert the network SIM in the handset which has given u the lg U400.
2. Enter 256303#*9636#
3. The phone will then prompt ‘Unlock sim’. Press OK.
4. The phone will then prompt ‘Network Unlock’. Press OK.
5. The phone will then prompt- ‘Input Network Control Key’. Enter the 8 digit unlocking code. Press OK.
If the unlocking code comes with only 7 digits, add a 0 in front of the 7 digit code. If the unlocking code comes with only 6 digits, add 00 in front of the 6 digit code.
6. It should give you the message Success.
7. Come back to the main screen and Enter 56303#*9636#
8. The phone will then prompt unlock sim. Press OK.
9. The phone will then prompt Network Unlock/ Lock but if you scroll down you will see a message Enter SP Lock. Enter SP Code.
10. Then press OK.
I can’t help you with the ‘Input Network Control Key’ section..
Answer #2
What’s an SP code?
Answer #3
I have carried out steps 1-2, but nothing happens? Any thoughts anyone?